var x = '后'
console.log(x);

x = {
    names:'一个各',
    age:12,
}

console.log(x);
x=function(){
    console.log('函数');
    return 3389
}
console.log(x());

console.log(3/2);
console.log(6/2);
console.log(8/2);
console.log(10/2);